.logo {
    width: 120px;
    height: 31px;
    background: #333;
    border-radius: 6px;
    margin: 16px 24px 16px 0;
    float: left;
}

.header {
    position: fixed;
    width: 100%;
}

.content {
    padding: 0 50px;
    margin-top: 64px;
}